Cavalieri, Buonaventura, Geometria indivisibilibvs continvorvm : noua quadam ratione promota

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[531.] COROLLARIVM XXVII.
[532.] SCHOLIV M.
[533.] Finis quarti Libri.
[534.] GEOMETRIÆ CAVALERII. LIBER QVINTVS. In quo de Hyperbola, Oppoſitis Sectionib us, ac ſolidis ab eiſdem genitis, babetur contemplatio. THEOREMA I. PROPOS. I.
[535.] THEOREMA II. PROPOS. II.
[536.] THEOREMA III. PROPOS. III.
[537.] THEOREMA IV. PROPOS. IV.
[538.] THEOREMA V. PROPOS. V.
[539.] PROBLEMA I. PROPOS. VI.
[540.] THEOREMA VI. PROPOS. VII.
[541.] THEOREMA VII. PROPOS. VIII.
[542.] THEOREMA VIII. PROPOS. IX.
[543.] THEOREMA IX. PROPOS. X.
[544.] THEOREMA X. PROPOS. XI.
[545.] THEOREMA XI. PROPOS. XII.
[546.] THEOREMA XII. PROPOS. XIII.
[547.] THEOREMA XIII, PROPOS. XIV.
[548.] SCHOLIVM.
[549.] THEOREMA XIV. PROPOS. XV.
[550.] THEOREMA XV. PROPOS. XVI.
[551.] COROLLARIVM.
[552.] THEOREMA XVI. PROPOS. XVII.
[553.] THE OREMA XVII. PROPOS. XVIII.
[554.] THEOREMA XVIII. PROPOS. XIX.
[555.] COROLLARIVM.
[556.] SCHOLIVM.
[557.] THEOREMA XIX. PROPOS. XX.
[558.] THEOREMA XX. PROPOS. XXI.
[559.] A@@ter ſupradictam rationem explicare.
[560.] COROLLARIVM:
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410390GEOMETRIÆ eorum notitia in ſuppoſitione eiuſdem byperbolæ qudaraturæ deficiat;
ſi quis tamen adbuc voluerit aliacirca eandem contemplari, metbo-
dum tenere poterit Lib.
2. & 3. à me proſequutam, mibi verò poſt
byperbolarum ſpeculationem ad oppoſitas ſectiones, &
coniugatas
Appolonij opportunè videtur tranſeundum.
THEOREMA XIX. PROPOS. XX.
SI ad axim, vel diametrum vtriuſq; oppoſitarum ſectio-
num ordinatim applicentur rectæ lineæ in eaſdem
terminatæ, ita vt abſciſſæ per eaſdem ab axibu, vel dia-
metris verſus vertices ſint æquales erũt iſtæ applicatæ pa-
rallelogrammi oppoſita latera, quod parallelogrãmum ſi
compleatur, regula applicatarum altera ſumpta, omnia
quadrata parallelogrammi conſtituti ad reliquum, dem-
ptis ab ijſdem omnibus quadratis oppoſitarum hyperbo-
larum iam ſer dictas ordinatim applicatas conſtitutarum,
erunt vt rectangulum ſub compoſita ex tranſuerſo latere,
&
axi, vel diametro alterutrius oppoſitarum hyperbola-
rum, &
ſub compoſita ex hoc axi, vel diametro, & . tran-
ſuerſi lateris, ad rectangulum bis ſub .
tranſuerſi lateris,
&
ſum compoſita ex. eiuſdem tranſuerſi lateris, & axi,
vel diamerro alrerutrius oppoſitarum hyperbolarum, cum
{2/3}.
quadrati eiuſdem axis, vel diametri.
Sint oppoſitæ ſectiones, AMC, BND, quarum latus tranſuer-
ſum ſit, NM, communis axis, vel diameter earundem, ad quam
hincinde productam ordinatim applicẽtur, BD, AC, in fectiones
terminatæ, abicindentes verſus vertices, NM, axes, vel diame-
tros, FN, ME, hyperbolarum, BND, AMC, (quas pariter oppo-
ſitas voco) quæ ſint inter ſe æquales, iunganturque, BA, DC, &

ſit, O, centrum oppoſitarum ſectionum, BND, AMC:
Quoniam
ergo, FN, ME, ſunt æquales, erunt etiam æquales, BD, AC, &

ſunt equidiſtantes, quia ad eandem diametrum, velaxim, FE, ſunt
11Blicitur
ex 29. Pri.
Con.
ordinatim applicate, ergo, BA, DC, erunt ęquidiſtantes, &
, BC,
parallelogrammum.
Dico ergo (regula ſumpta altera applica-
tarum, AC, BD, vt, AC,) omnia quadrata, BC, ad reliquum eo-
rundem demptis omnibus quadratis oppoſitarum hyperbolarum,
BND, AMC, eſſe vt rectangulum, NEO, ad rectangulum,

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